Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (u = 0; u < graf[v].size(); u++) { ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:82:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < componente[i].size(); j++) { ~~^~~~~~~~~~~~~~~~~~~~~~